There should be signal coming from the PCM (clear connector pin#3). It's a dark green wire with a white stripe. This is the wire that goes to the fuse box and activates the fuel pump relay. Check for a signal on that wire when the key is in the "ON" position. The signal only lasts for about 3 seconds so you'll have to have someone turn the key to "ON" while you check with a DVM or a 12 volt light tester.
If there is no signal it can only be one of four things:
1) Ignition switch
2) Security System
3) PCM
4) Dead short in the signal wire itself
I'm guessing the security system since you say it has never worked.
